A104820 -id:A104820 - cp's OEIS frontend

A104821 Positions of prime numbers A104820 in A104819.

3, 297, 4, 7, 12, 45, 330, 391, 82, 85, 92, 121, 251, 124, 214, 129, 304, 130, 353, 131, 137, 139, 144, 160, 163, 192, 286, 340, 146, 315, 150, 151, 158, 144, 160, 163, 192, 286, 340, 144, 160, 163, 192, 286, 340, 170, 172, 144, 160, 163, 192, 286, 340, 207

Offset: 1

Zak Seidov, Mar 27 2005

Cf. A104807, A104819, A104820.

A104821(n)=Position[A104819, A104820(n)]

A104819 Numbers with distinct digits appearing in partition of decimal expansion of Pi.

Original entry on oeis.org

314, 15926, 53, 5897, 932, 38462, 643, 38, 327950, 28, 84197, 1693, 9, 937510, 5820974, 94, 4592307816, 40628, 62089, 9862, 8034, 82534, 21, 1706, 798214, 80, 865132, 82306, 6470938, 4, 46095, 50, 582, 2317, 253, 5940812, 84, 81, 1, 1745028

Offset: 1

Zak Seidov, Mar 27 2005

Start with decimal expansion of Pi: 3,1,4,1,5,9,2,6,5,3,5,8,9,7,9,3,2,3,8,4,6,2,6,4,3... Part the sequence to the sections with distinct digits: s={3,1,4},{1,5,9,2,6},{5,3},{5,8,9,7},{9,3,2},{3,8,4,6,2},{6,4,3},... Then A104819(n) = number from digits of s(n): 314,15926,53,5897,932,38462,643,... Leading zero allowed as at first in a(42)= 193852 from {0,1,9,3,8,5,2}.

Cf. A104807, A104820.

Comment from Jani Melik, Nov 13 2009

cp's OEIS Frontend

A104821 Positions of prime numbers A104820 in A104819.

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A104819 Numbers with distinct digits appearing in partition of decimal expansion of Pi.

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