A068947 - OEIS

A068947

Square roots of A068809.

1, 2, 3, 7, 13, 17, 43, 63, 83, 167, 264, 313, 707, 836, 1667, 2236, 3114, 4472, 6833, 8167, 8937, 16667, 21886, 29614, 41833, 74833, 89437, 94863, 134164, 191833, 298327, 545793, 547613, 947617, 987917, 1643167, 3143167, 3162083, 5477133

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OFFSET

1,2

LINKS

Giovanni Resta, Table of n, a(n) for n = 1..80

EXAMPLE

13^2 = 169 = A068809(5), so a(5)=13.

MAPLE

A007953 := proc(n) option remember: return add(d, d=convert(n, base, 10)): end: A068947 := proc(n) option remember: local k, p: if(n=1)then return 1: fi: k:=procname(n-1): p:=A007953(k^2): do k:=k+1: if(A007953(k^2)>p)then return k: fi: od: end: seq(A068947(n), n=1..20); # Nathaniel Johnston, May 04 2011

CROSSREFS

Cf. A068809, A068948, A068949, A068950, A068952, A069324, A040047.

Sequence in context: A287147 A325545 A159079 * A068948 A329414 A329415

Adjacent sequences: A068944 A068945 A068946 * A068948 A068949 A068950

KEYWORD

nonn,base

AUTHOR

Francois Jooste (phukraut(AT)hotmail.com), Mar 15 2002

STATUS

approved