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Search: id:A024393
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| A024393 |
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4th elementary symmetric function of the first n+3 positive integers congruent to 2 mod 3. |
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+0
1
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| 880, 12164, 80844, 363944, 1276009, 3751209, 9668253, 22494813, 48216663, 96625243, 183045863, 330597267, 573081782, 958613782, 1554102702, 2450715342, 3770450706, 5673969126, 8369825926, 12125268386, 17278763271, 24254430695
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OFFSET
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1,1
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EXAMPLE
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sigma_4(2,5,8,11,14,17) = 2*5*8*11 + 2*5*8*14 + 2*5*8*17 + 2*5*11*14 + 2*5*11*17 + 2*5*14*17 + 2*8*11*14 + 2*8*11*17 + 2*8*14*17 + 2*11*14*17 + 5*8*11*14 + 5*8*11*17 + 5*8*14*17 + 5*11*14*17 + 8*11*14*17 = 80844. This is also the value of n(n+1)(n+2)(n+3)(16376+30534*n+18495*n^2+4590*n^3+405*n^4)/1920 for n=3. - Neven Juric (neven.juric(AT)apis-it.hr), Jun 25 2005
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CROSSREFS
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Sequence in context: A129313 A063051 A118799 this_sequence A006052 A105976 A137064
Adjacent sequences: A024390 A024391 A024392 this_sequence A024394 A024395 A024396
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KEYWORD
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nonn
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AUTHOR
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Clark Kimberling (ck6(AT)evansville.edu)
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EXTENSIONS
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a(3) corrected by Neven Juric Jun 25 2005
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