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A015226 Even hexagonal pyramidal numbers. 0
22, 50, 252, 372, 946, 1222, 2360, 2856, 4750, 5530, 8372, 9500, 13482, 15022, 20336, 22352, 29190, 31746, 40300, 43460, 53922, 57750, 70312, 74872, 89726, 95082, 112420, 118636, 138650, 145790, 168672, 176800, 202742, 211922, 241116 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

FORMULA

Even numbers of form n(n+1)(4n-1)/6.

MATHEMATICA

Select[ Table[ n(n+1)(4n-1)/6, {n, 100} ], EvenQ ]

CROSSREFS

Sequence in context: A039345 A043168 A043948 * A092221 A191279 A200880

Adjacent sequences:  A015223 A015224 A015225 * A015227 A015228 A015229

KEYWORD

nonn,easy

AUTHOR

Mohammad K. Azarian (ma3(AT)evansville.edu)

EXTENSIONS

More terms from Erich Friedman (erich.friedman(AT)stetson.edu).

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Last modified February 14 13:08 EST 2012. Contains 205623 sequences.