A368360 Comma transform of the even numbers.

2, 24, 46, 68, 81, 1, 21, 41, 61, 82, 2, 22, 42, 62, 83, 3, 23, 43, 63, 84, 4, 24, 44, 64, 85, 5, 25, 45, 65, 86, 6, 26, 46, 66, 87, 7, 27, 47, 67, 88, 8, 28, 48, 68, 89, 9, 29, 49, 69, 81, 1, 21, 41, 61, 81, 1, 21, 41, 61, 81, 1, 21, 41, 61, 81, 1, 21, 41, 61, 81, 1, 21, 41, 61, 81, 1, 21, 41, 61, 81, 1, 21, 41, 61, 81, 1, 21, 41, 61

Offset: 0

Author

N. J. A. Sloane, Jan 02 2024

Keywords

• nonn
• base

Comments

See A367360 for further information.

Links

• Alois P. Heinz, Table of n, a(n) for n = 0..10000

Crossrefs

Cf. A005843, A367360.

Programs

Maple

a:= n-> parse(cat(""||(2*n)[-1], ""||(2*n+2)[1])):
seq(a(n), n=0..88);  # Alois P. Heinz, Jan 03 2024

Python

def A368360(n): return (0,20,40,60,80)[n%5]+int(str(n+1<<1)[0]) # Chai Wah Wu, Jan 03 2024