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A131766 a(n) = A131668(n) - (2n+1). 1
0, 0, 0, 0, 0, 18, 36, 54, 72, 180, 378, 576, 774, 972, 2970, 4968, 6966, 8964, 19962, 39960, 59958, 79956, 99954, 299952, 499950, 699948, 899946, 1999944, 3999942, 5999940, 7444438, 9999936, 29999934, 49999932, 69999930, 89999928 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

COMMENTS

Digital sums: 9*A002266.

LINKS

Table of n, a(n) for n=0..35.

CROSSREFS

Sequence in context: A004941 A004961 A008600 * A154575 A097926 A087967

Adjacent sequences:  A131763 A131764 A131765 * A131767 A131768 A131769

KEYWORD

nonn,base

AUTHOR

Paul Curtz, Oct 04 2007

STATUS

approved

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Last modified September 28 07:55 EDT 2020. Contains 337394 sequences. (Running on oeis4.)