a(n) is the string of integers S(n) concatenated together with no commas, where S(1)=1; for even n, S(n) is obtained from S(n-1) by inserting n after 1; and for odd n>1, S(n) = n,S(n-1).

A171094

a(n) is the string of integers S(n) concatenated together with no commas, where S(1)=1; for even n, S(n) is obtained from S(n-1) by inserting n after 1; and for odd n>1, S(n) = n,S(n-1).

Terms

    a(0) =1a(1) =12a(2) =312a(3) =3142a(4) =53142a(5) =531642a(6) =7531642a(7) =75318642a(8) =975318642a(9) =97531108642

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