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A059293 a(n) = round(n*(5*n - 14)/12) + 1. 1
1, 0, 0, 1, 3, 6, 9, 13, 18, 24, 31, 39, 47, 56, 66, 77, 89, 102, 115, 129, 144, 160, 177, 195, 213, 232, 252, 273, 295, 318, 341, 365, 390, 416, 443, 471, 499, 528, 558, 589, 621, 654, 687, 721, 756, 792, 829, 867, 905, 944, 984, 1025, 1067 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

REFERENCES

L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 122, see #19 (2), I(n).

LINKS

Harry J. Smith, Table of n, a(n) for n = 0..1000

MATHEMATICA

Table[Round[n*(5*n - 14)/12], {n, 0, 10}] + 1 (* G. C. Greubel, Jan 04 2017 *)

PROG

(PARI) { default(realprecision, 100); for (n = 0, 1000, write("b059293.txt", n, " ", round(n*(5*n - 14)/12) + 1); ) } \\ Harry J. Smith, Jun 25 2009

(MAGMA) [Round(n*(5*n-14)/12)+1: n in [0..60]]; // Vincenzo Librandi, Jan 05 2017

CROSSREFS

Sequence in context: A014785 A132352 A033436 * A002578 A129728 A310160

Adjacent sequences:  A059290 A059291 A059292 * A059294 A059295 A059296

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jan 25 2001

STATUS

approved

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Last modified November 21 11:39 EST 2018. Contains 317447 sequences. (Running on oeis4.)