OFFSET

1,2

COMMENTS

80 <= a(8) <= 88, 110 <= a(9) <= 122, 147 <= a(10) <= 174, 194 <= a(11) <= 236, 249 <= a(12) <= 303, 316 <= a(13) <= 372.

FORMULA

a(7*n) = 49*n^3.

CROSSREFS

KEYWORD

nonn,hard,more

AUTHOR

Richard Bean, Aug 19 2022

STATUS

approved