A247361 Interleave A000861\{0} and A247359: positive numbers with English name ending in a vowel resp. consonant.

1, 4, 2, 6, 3, 7, 5, 8, 9, 10, 12, 11, 21, 13, 22, 14, 23, 15, 25, 16, 29, 17, 31, 18, 32, 19, 33, 20, 35, 24, 39, 26, 41, 27, 42, 28, 43, 30, 45, 34, 49, 36, 51, 37, 52, 38, 53, 40, 55, 44, 59, 46, 61, 47, 62, 48, 63, 50, 65, 54, 69, 56, 71, 57, 72, 58, 73, 60, 75, 64, 79, 66, 81, 67, 82, 68, 83, 70, 85, 74, 89, 76, 91, 77, 92, 78, 93, 80, 95, 84, 99

Offset: 1

Author

M. F. Hasler, Sep 14 2014

Keywords

• nonn
• word

Comments

A permutation of the positive integers.

See A247362 for a variant defined on the nonnegative integers.

Examples

			Every other term is taken from the set A000861 \ {0} = {onE, twO, threE, fivE, ninE, twelvE, ...} resp. from A247359 = {fouR, siX, seveN, eighT, teN, eleveN, ...}
		

Crossrefs

Cf. A000861, A247359, A247362.

Formula

a(2n)=A247362(2n-1), a(2n-1) = A247362(2n).