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A085440
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a(n) = Sum_{i=1..n} C(i+1,2)^5.
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22
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1, 244, 8020, 108020, 867395, 4951496, 22161864, 82628040, 267156165, 770440540, 2022773116, 4909947484, 11150268935, 23913084560, 48796284560
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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REFERENCES
| Elisabeth Busser and Gilles Cohen, Neuro-Logies - "Chercher, jouer, trouver", La Recherche, April 1999, No. 319, page 97.
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FORMULA
| i=1_Sum_n [i+1_C_2]^5 = [ 113400*n^11 +1247400*n^10 +5544000*n^9 +12474000*n^8 +14196600*n^7 +6237000*n^6 -831600*n^5 +1108800*n^3 -172800*n ]/11!
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CROSSREFS
| Cf. A000292, A087127, A024166, A024166, A085438, A085439, A085441, A085442, A000332, A086020, A086021, A086022, A000389, A086023, A086024, A000579, A086025, A086026, A000580, A086027, A086028, A027555, A086029, A086030.
Sequence in context: A081864 A002594 A194134 * A146552 A164656 A013684
Adjacent sequences: A085437 A085438 A085439 * A085441 A085442 A085443
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KEYWORD
| easy,nonn
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AUTHOR
| Andre F. Labossiere (boronali(AT)laposte.net), Jun 30 2003
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