OFFSET
1,1
COMMENTS
a(n) has exactly n representations as an 4-dimensional pyramidal number P(m, k) = binomial(k + 2, 3)*(k*(m - 2) - m + 6) / 4, with m > 2, k > 1.
EXAMPLE
a(3) = 35 because 35 is the least integer which is 4-dimensional pyramidal in 3 ways (35 = P(3, 4) = P(7, 3) = P(33, 2)).
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Ilya Gutkovskiy, Apr 10 2020
EXTENSIONS
a(9) from Giovanni Resta, Apr 11 2020
a(9) corrected and a(10)-a(12) from Bert Dobbelaere, Apr 14 2020
STATUS
approved