OFFSET

1,1

EXAMPLE

a(2) = 10 because 20, 21, 22, 23, 24, 40, 41, 42, 43 and 44 are the base 5/2 expansions for the integers 5, 6, 7, 8, 9, 10, 11, 12, 13 and 14 respectively and these are the only integers with 2 digits.

PROG

(Sage)

A=[1]

for i in [1..60]:

A.append(ceil(((5-2)/2)*sum(A)))

[5*x for x in A]

CROSSREFS

KEYWORD

nonn,base

AUTHOR

Hailey R. Olafson, Jul 21 2014

STATUS

approved