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 A111417 a(n) = A034869(n) - A008311(n). 0
 0, 0, 1, 0, 0, 0, 3, 0, 0, 0, 0, 0, 10, 0, 0, 0, 0, 0, 0, 0, 35, 0, 0, 0, 0, 0, 0, 0, 0, 0, 126, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 462, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1716, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 6435, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 24310, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,7 LINKS FORMULA a(n) = A001700(m) if n = (m+1)*(m+2) and a(n) = 0 otherwise. CROSSREFS Sequence in context: A095269 A308275 A308254 * A007271 A327449 A320179 Adjacent sequences:  A111414 A111415 A111416 * A111418 A111419 A111420 KEYWORD easy,nonn AUTHOR Philippe Deléham, Nov 13 2005 STATUS approved

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Last modified January 23 07:16 EST 2022. Contains 350506 sequences. (Running on oeis4.)