1,1

Table of n, a(n) for n=1..90.

Last[#]-First[#]-1&/@Partition[Transpose[Position[RealDigits[Pi, 10, 1000], 5]][[2]], 2, 1] (* Harvey P. Dale, Dec 06 2013 *)

Cf. A135088, A000796.

Sequence in context: A038455 A067802 A181832 * A030042 A045496 A024432

Adjacent sequences: A139720 A139721 A139722 * A139724 A139725 A139726

nonn,base

Daniel Drijard (daniel.drijard(AT)cern.ch)

approved