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A189475 First differences of A036449, triangular numbers by definition. 2
1, 3, 21, 171, 1485, 435, 16653, 149331, 1342341, 12076155, 990528, 1279200, 263901, 169071, 446985, 133865703, 1180416, 1214185281, 2366400, 25045503, 247275441, 8923200, 19634511, 56525028, 229847520, 739374285, 224497455, 81939201, 24010841091, 1106357280 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

a(n) = A036449(n+1) - A010054(n).

Subsequence of A000217; A010054(a(n)) = 1.

LINKS

Donovan Johnson, Table of n, a(n) for n = 1..144

PROG

(Haskell) Cf. program in A036449 (simultaneous computation).

CROSSREFS

Sequence in context: A046637 A220103 A132805 * A206178 A233861 A206397

Adjacent sequences:  A189472 A189473 A189474 * A189476 A189477 A189478

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Apr 23 2011

STATUS

approved

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Last modified March 19 17:21 EDT 2019. Contains 321330 sequences. (Running on oeis4.)