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A125575 Initial digits of prime squares. +0
1
4, 9, 2, 4, 1, 1, 2, 3, 5, 8, 9, 1, 1, 1, 2, 2, 3, 3, 4, 5, 5, 6, 6, 7, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 4, 4, 5, 5, 5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 (list; graph; listen)
OFFSET

1,1

FORMULA

a(n) = A000030(A000290(A000040(n))) - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 07 2007

MAPLE

A000030 := proc(n) local idig ; idig := n ; while idig > 9 do idig := iquo(idig, 10) ; od ; RETURN(idig) ; end ; A000040 := proc(n) ithprime(n) ; end; A125575 := proc(n) A000030(A000040(n)^2) ; end; for n from 1 to 100 do printf("%d, ", A125575(n)) ; end; - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 07 2007

CROSSREFS

Sequence in context: A006830 A098174 A126709 this_sequence A021071 A021207 A070437

Adjacent sequences: A125572 A125573 A125574 this_sequence A125576 A125577 A125578

KEYWORD

easy,nonn,base

AUTHOR

Anonymous, Jan 03 2007

EXTENSIONS

More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 07 2007

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Last modified July 23 17:35 EDT 2008. Contains 142285 sequences.


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