0,3

Table of n, a(n) for n=0..104.

a(5)=1 since 5=5, a(6)=2 since 6=1+5, a(7)=3 since 7=1+1+5, a(10)=2 since 10=5+5 with 1 and 5 pentagonal numbers.

Cf. A002828, A061336.

Sequence in context: A260688 A053344 A092196 * A145172 A280053 A283365

Adjacent sequences: A100875 A100876 A100877 * A100879 A100880 A100881

nonn

Franz Vrabec, Jan 09 2005

More terms from David Wasserman, Mar 04 2008

approved