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Search: id:A048509
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A048509 a(n)=T(4,n), array T given by A048505. +0
1
1, 26, 87, 233, 577, 1377, 3217, 7409, 16881, 38129, 85489, 190449, 421873, 929777, 2039793, 4456433, 9699313, 21037041, 45481969, 98041841, 210763761, 451936241, 966787057, 2063597553, 4395630577, 9344909297, 19830669297 (list; graph; listen)
OFFSET

0,2

FORMULA

(n^2+17n+64) * 2^(n-2) - 15. - Ralf Stephan, Feb 05 2004

CROSSREFS

n-th difference of a(n), a(n-1), ..., a(0) is (25, 36, 49, 64, 81...).

Adjacent sequences: A048506 A048507 A048508 this_sequence A048510 A048511 A048512

Sequence in context: A042332 A138081 A118543 this_sequence A044213 A044594 A038654

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

page 1

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Last modified October 9 14:06 EDT 2008. Contains 144831 sequences.


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