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Search: id:A161464
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| A161464 |
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Sum of all digits of primes from n-th prime to (2*n-1)-th prime. |
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+0
1
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| 2, 8, 14, 21, 29, 42, 53, 63, 75, 90, 97, 120, 143, 144, 155, 159, 167, 180, 193, 204, 224, 235, 249, 261, 262, 267, 286, 304, 324, 340, 359, 373, 380, 387, 401, 414, 440, 459, 483, 493, 509, 507, 523, 540, 554, 567, 587, 619, 634, 641, 654, 677, 696, 728, 760
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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2nd prime to 3rd prime are 3, 5, hence a(2) = 8; 3rd prime to 5th prime are 5, 7, 11, hence a(3) = 14; 4th prime to 7th prime are 7, 11, 13, 17, hence a(4) = 21.
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PROGRAM
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(MAGMA) [ &+[ &+Intseq(NthPrime(k), 10): k in [n..2*n-1] ]: n in [1..55] ]; [From Klaus Brockhaus, Jun 13 2009]
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CROSSREFS
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Cf. A000040 (primes), A007605 (sum of digits of n-th prime).
Sequence in context: A046939 A082930 A064148 this_sequence A121055 A107072 A120413
Adjacent sequences: A161461 A161462 A161463 this_sequence A161465 A161466 A161467
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KEYWORD
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nonn,base
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AUTHOR
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Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jun 10 2009
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EXTENSIONS
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Edited and extended by Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Jun 13 2009
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